Optical circuit for comparing two N-bit binary words

Details Optical circuit for comparing two N-bit binary words Optical circuit for comparing two N-bit binary words

2011-01-11

2011-01-11

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Optical computing without diffraction

Logic gate

Reexamination Certificate

active

07869107

ABSTRACT:
An optical comparator circuit includes a first stage including an optical gate which receives the signals applied to the two inputs and produces at its output an N bit signal with each bit being representative of the logical expression A XOR B for a respective pair of bits of the words A and B, a second stage which comprises an optical gate having at least two inputs, a first input being connected to the output of the first stage by an optical connection having a first time delay, and a second input being connected to the output of the first stage through (N−1) further optical connections, each further connection having a different associated time delay which is longer than the first time delay.

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